Re: [PATCH v4] ata/pata_buddha: Probe via modalias instead of initcall

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On 8/11/19 9:28 PM, Max Staudt wrote:
Replying to my own patch with two more questions:


On 08/11/2019 05:36 PM, Max Staudt wrote:
-		/* allocate host */
-		host = ata_host_alloc(&z->dev, nr_ports);

Actually, this is an issue even the existing pata_buddha has: ata_host_alloc()> will dev_set_drvdata(dev, host) which is fine on Buddha and Catweasel, bu> conflicts with zorro8390's own dev_set_drvdata() on an X-Surf board. Thus,
if both pata_buddha and zorro8390 are active, only one can be unloaded. The
original ide/buddha driver does not have this problem as far as I can see.

ide/buddha driver cannot be unloaded currently (it lacks module_exit()).

This should be resolved once we get around to MFD support, as Geert suggested.

Shall we leave this as-is, as it's not really a change from the status quo in
pata_buddha?
pata_buddha also cannot be unloaded currently (also lacks module_exit()),
I think that we should leave it as it is until MFD support is added.

+static int __init pata_buddha_late_init(void)
+{
+        struct zorro_dev *z = NULL;
+
+	pr_info("pata_buddha: Scanning for stand-alone IDE controllers...\n");
+	zorro_register_driver(&pata_buddha_driver);
+
+	pr_info("pata_buddha: Scanning for X-Surf boards...\n");
+        while ((z = zorro_find_device(ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, z))) {
+		static struct zorro_device_id xsurf_ent =
+			{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, BOARD_XSURF};
+
+		pata_buddha_probe(z, &xsurf_ent);
+        }
+
+        return 0;
+}

This is suboptimal, as we don't release memory in case pata_buddha_probe()
fails. Any suggestions?

It should work exactly like the old code in case of X-Surf,
what do we need to release?

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics



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